gecko-dev/lib/libmsg/msgundo.h

70 строки
2.2 KiB
C

/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*/
/* This file is obsolete
msgundo.h --- internal defs for the msg library, dealing with undo stuff
*/
#ifndef _MSGUNDO_H_
#define _MSGUNDO_H_
XP_BEGIN_PROTOS
/* Initialize the undo state. This must be called when the context is
initialized for mail/news. It should also be called later whenever
the undo state should be thrown away (because the user has just
done an non-undoable operation. If this returns a negative value,
then we failed big-time (ran out of memory), and we should abort
everything.*/
extern int msg_undo_Initialize(MWContext* context);
/* Throw away the undo state, as part of destroying the mail/news context. */
extern void msg_undo_Cleanup(MWContext* context);
/* Log an "flag change" event. The given flag bits indicate what to do to
execute the undo. */
extern void msg_undo_LogFlagChange(MWContext* context, MSG_Folder* folder,
unsigned int message_offset,
uint16 flagson, uint16 flagsoff);
/* Mark the beginning of a bunch of actions that should be undone as
one user action. Should always be matched by a later call to
msg_undo_EndBatch(). These calls can nest. */
extern void msg_undo_StartBatch(MWContext* context);
extern void msg_undo_EndBatch(MWContext* context);
extern XP_Bool msg_CanUndo(MWContext* context);
extern XP_Bool msg_CanRedo(MWContext* context);
XP_END_PROTOS
#endif /* !_MSGUNDO_H_ */